Section 58. There is hereby established and set up on the books of the commonwealth a separate fund to be known as the Public Health Trust Fund. The fund shall consist of fees assessed under section 56 and all other monies credited or transferred to the fund from any other source under law. The secretary of health and human services shall be the trustee of the fund and may only expend monies in the fund, without further appropriation, to assist social service and public health programs dedicated to addressing problems associated with compulsive gambling including, but not limited to, gambling prevention and addiction services, substance abuse services, educational campaigns to mitigate the potential addictive nature of gambling and any studies and evaluations necessary, including the annual research agenda under section 71, to ensure the proper and most effective strategies.